Practice Test Geeks(CST) Certified Scale Technicians Practice Test
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Analog & Digital Scale Technology Flashcards

7 cards from real CST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Analog & Digital Scale Technology flashcards as text

  1. According to NIST Handbook 44, what is the maximum number of scale divisions (n) allowed for a Class III commercial scale?

    Answer: 10,000

    NIST Handbook 44 allows Class III scales a maximum of 10,000 scale intervals (n), balancing resolution with accuracy requirements for commercial use.

  2. In analog dial scales, the term 'graduation' refers to:

    Answer: Individual marks on the dial face representing weight increments

    A graduation is each individual division mark on the scale dial or chart, with the interval value defining the smallest readable increment.

  3. Which test is used to detect a digital scale's ability to return to zero after a load is removed?

    Answer: Return-to-zero test

    The return-to-zero test verifies that after removing a test load, the indicator reading returns to the same zero reference within tolerance.

  4. A spring scale reads 4.95 lb when a certified 5.00 lb test weight is applied. The error expressed as a percentage of the applied load is:

    Answer: −1.0%

    Error = (4.95 − 5.00) / 5.00 × 100 = −1.0%, meaning the scale under-reads by 1%.

  5. What is the function of an analog-to-digital converter (ADC) in a digital weighing indicator?

    Answer: Converts the continuous millivolt signal from the load cell to a digital numeric value

    The ADC samples the analog mV/V load cell signal and converts it to a digital number that the microprocessor can process and display as a weight.

  6. Hysteresis in a weighing scale is best described as:

    Answer: Difference in readings between loading and unloading at the same applied weight

    Hysteresis is the path-dependent error where the scale reads differently for the same load depending on whether the load was approached from below or above.

  7. Which OIML accuracy class requires the smallest minimum load cell verification interval (v min)?

    Answer: Class A (special)

    OIML Class A (special precision) instruments have the strictest tolerances and require the smallest verification interval, supporting the highest resolution measurements.